Power-transmission gearing.



J. W. RENO. POWER TRANSMISSION GEARING. APPLIOATION FILED MAR.30, 1910.

Patented July 26, 1910.

2 SHEETS-SHEET 1.

ML -----.-ZI1 1g WITNESSES:

J. W. RENO. POWER TRANSMISSION GEARING. AiPLIOAIION FILED MAR.30,1910v Patented July 26, 1910 2 SHEETS-SHEET 2.

INVENTOR WITNESSES:

ATTORNEY UFFTCE.

:iEssn-w. Reno, or. NEW YORK, N. Y.

POWERe-TRANSMISSION GEARING.

Specification of Letters Patent. Patented July 26, 1910.

Application filed March 30, 1910. Serial No. 552,384.

To all whom it may concern:

Be it known that I, Jnssn W. RENo, a citizen of the United States of America, and resident of thecity, county, and State of New York, have invented certain new and useful Improvements in Power-Transmission Gearing, of which the following is a specification. Y

My invention relates to improvements in power transmitting mechanism.

The object of my invention is to provide a mechanism of this class which shall be simple and effective in its construction and operation and one which is especially adapted to transmit power from. a prime mover operating at a relatively high speed, such as a steam turbine, to a relatively slow speed shaft, such as the propeller shaft of a boat.

It is well known that steam turbines operate best at a relatively high speed and that where circumstances permit a high rotative speed of the turbine rotor, a smaller and less expensive turbine may be used. Es pecially it has been found in the application of steam turbines for the propulsion of boats that notwithstanding the relatively and uneconomically. great size of the turbines, the propellers being directly connected and operating in unison with the turbine shaft, have been compelled to run at a much higher speed than that which is found to be most eificient. At the same time the vdifiiculties attending theuse of ordinary forms of reduction gearing for the transmission of large powers at high speed, have prevented thelr use.

Another object of my invention is to provide a simple and efficient means whereby the driven member or shaft, such for instance as the propeller shaft of a boat, may be reversed without the necessity of reversing Itohe direction of rotation of the steam tur- Heretofore the reversing of propellers driven by steam turbines has been accomplished by an auxiliary turbine or an auxlliary extension of the turbine rotor, which is cumbersome, inefficient and expensive.

My invention consists in mounting a pair of gears u on the driven shaft, in providing a pinion s aft which has a pair of pinions engaging the gears on said driven shaft, in-

mounting said pinion shaft in a frame which is adapted to pivot about the driven shaft and is also pivotally mounted on an axis normal to that of the driven shaft, whereby the alinement of said pinion shaft may providing clutch members on the ends of each of said pinion shafts, in providin means for rotating the frame in which sai pinion shafts are mounted about the driven shaft so as to bring either of said pinion shafts, at will, into alinement with a prime mover shaft,'such as a steam turbineshaft, and in other novel features of construction to be hereinafter more fully pointed out and described.

In the drawings accompanying and forming part of this application, Flgure 1 is a plan view of the preferred form of my invention, Fig. 2 is a transverse sectional view, Figs. 3 and & represent diagrammatic views corresponding to'Fig. 2 showing the parts in different operative positions, and Figs. 5 and 6 represent plan and end views, respectively, of the frame-supporting bearing.

The reference characters are used in the same sense throughout the drawings and the specification.

Numeral 1 represents the driven shaft, such for instance as the propeller shaft of a boat. Upon this shaft rigidly secured thereto are mounted the two gears 2. These gears may be either of the ordinary spur gear form or of the form known as spiral gears. The shaft 1 runs in the stationary or fixed bearings 3'. Upon the shaft 1,-be-

tween the gears 2, is mounted a bearing 4: which is constructed of two half bearings provided with bolts 5 for clamping them together. are provided with semi-cylindrical extensions 6 which when the bearing is bolted together. form 'a cylindrical journal. A frame 7 incloses the ears 2 and has a central web 8 upon whi'c is formed a bearin 9 having caps 10 which receive the journa extensions 6 of the bearing 4. By means of this construction the frame 7 can rotate about the center of the shaft 1 and can also oscillate a small amount about the axis of the journals 6 which axis is normal or at right angles to the axis of the shaft 1. The purpose of this construction is to provide a universal joint connection between the frame and The two parts of the bearing 4.-

the gear shaft which will permit the pinion shaft 12 to accommodate itself to any slight irregularities in the gears -2 or pinions 13 Y and therehly to secure a uniform and equally pressure between the teeth of frame 7. A pinion 16 is secured to the pin-' i'on shaft 15 and is'adapted in one position to engagethe pinion 14 and in its other position to pass out of engagement with said pinion. The frame 7 is provided with a rack 18 which is concentric with the shaft 1 and adapted to engage the pinion 19 secured to the shaft 20, which shaft 20 is journaled in the brackets 21 and 22. A hand wheel 23 is secured to the shaft 20 and a lockin bolt 24 is mounted in said hand wheel a apted to engagean opening 25 in the bracket 22. A steam turbine orother prime mover is represented b numeral 26 and the prime mover shaft 27 is provided with a coupling member 28 adapted to engage oneor other of the cou ling members 29 or 30, according to which is brou ht into alinement with the rime mover sha The sliding bearings 1 in which the pinion shaft 15 is journaled are provided with surfaces 31 adapted to engage the cam surface 32 of the bracket 33, which cam surface is so constructed as to cause the bearings 17 to move in the elongated openings 34 until the pinion 16 passes into mesh w1th the pinion 14 as the pinion shaft 15 is swung into alinement with the prime mover shaft 27.

The driven shaft 1 is provided with a 'brake wheel 35 secured thereto and a brake 36 of any approved construction, the details of which are not shown in the'drawings, is provided toengage 'the brake wheel 35 to old the driven shaft 1 stationary while the prime mover shaft is being cou'pledor uncouptled from either the shaft 12 or the sha 15.

When the parts are in thepositions shown in Figs. 1, 2 and 3 the pinion shaft 12 is in alinement with the runs mover shaft 27 and when the coupling member 28 is enaged with the coupling member 29 the riven shaft will. be driven in a direction the reverse of that 'of the direction of the prime mover shaft. When, however, the

shaft 15 is. brought into alinement and coupled with the prime mover shaft, the direction of the driven shaft will be reversed and it will then rotate in the same direction as the prime mover shaft.

Having thus described'my invention, what I claim is 1. In 'a power transmission gearing the combination with a shaft and a gear secured thereto, of a pinion shaft, a pinion secured to said pinion shaft, and a frame in which said pinion shaft is journaled, supported upon a pivot whose axis is at right angles to the axis of said pinion shaft.

2. In a power transmission gearing the combination with a shaft and a pair of gears securedthereon, of a pinion shaft, a pair of pinions secured thereon in mesh with said gears, a frame .in which said pinion shaft is journaled and a pivotal support for said frame'having its aXis located between said gears and at right angles to said shafts.

3. In a power transmission gearing the combination with a gear shaft and a pair of gears secured thereon, of a pinion shaft, a pair of pinions secured thereon in mesh with said gears, a frame in which said pinion shaft isjournaled, a bearing on said gear shaft between .said gears, and a pivotal connection between said bearing and said frame having itsaxis normal to the axes of said shafts.

4. In a power transmission gearing the combination with a shaft anda gear secured thereon, of a pinionshaft, a pinion secured thereon in mesh w1th sald gear, a

frame in which said pinion shaft is journaled, adapted to turn about the axis of said gear shaft, a pinion shaft bearing movably mounted in said frame, a second pinion shaft journaled in said movable bearing,a pinion secured to said second pinion shaft and means for'bringing it into and out of engagement with said first named pinion.

5. In a power transmission gearing the combination with a gear shaft and a pair of gears secured thereon, of a pinion shaft, a pair of pinions secured thereon in mesh respectively with said gears, a middle pinion on. said pinion shaft between said pair of pinions, a second pinion shaft, a pinion secured thereon in mesh with said middle pinion, a frame in which said pinion shafts are journaled pivotally supported coaxially with said gear shaft.

6. In a power transmission gearing the combination with a gear shaft and a pair of gears secured thereon, of a pinion shaft, .a pair of. pinions secured thereon in mesh respectively with said gears, a middle pinion on said pinion shaft between said pair of pinions, a second pinion shaft, a pinion secured thereon in mesh with said middle pinion, a frame in which said pinion shaftsare journaled pivotally supported coaxially with said gear shaft, a driving shaft, and means for turning said frame to bring one or the other of said pinion shafts in alinement with said driving shaft.

7. In a power transmitting mechanism the combination with a gear shaft and a pair of gears secured thereon, of a pinion shaft,

a pair of pinions secured thereon in mesh with said gears and a third p1n1on secured thereon between the pinions of said pair, a

second pinion shaft and a pinion secured thereon in mesh with the said third or middle pinion, a frame in which said pinion shafts are journaled, said frame being pivoted on two. axes, onecoincident with and tplefpther normal to the axis of "said gear s a 8. In a power transmitting mechanism the combination with a gear shaft and a air of bring one or the other of said pinion shafts in alinement with said driving shaft.

9. In a power transmitting mechanism the combination with a gear shaft and a pair of gears secured thereon, of a pinion shaft, a

pair of pinions secured thereon meshing with said gears and a third pinion between said pair, secured thereon, a second pinion'shaft and a pinion secured thereon in mesh with said third or middle inion, a fram'e'in which sald p1n1on sha s are ournaled, a

' bearing on said gear shaft between said gears, and a pivotal connection having its axis normal to said gear shaft connecting said bearing and said frame.

10. In a power transmission gearing, the combination with a gear shaftand gear secured thereon, of a pinion shaft, a pinion secured thereon in mesh 'with said gear, a frame in which said pinion shaft is journaled, and a universal joint connection between said frame and said gear shaft.

11. In a power transmission gearing, the combination with a gear shaft and a gear secured thereon, of a pinion shaft, a pinion secured thereon in mesh with said gear, a

frame in which said pinion shaft is journaled ada ted to turn about the axis of said gear sha a bearing slidably mounted in said frame, a second pinion shaft mounted in said bearing, a.pinion secured thereon, and a cam adapted to engage said slidable bearing."

12. In a power transmission mechanism the combination with a gear shaft and a pair of gears secured thereon, of a frame journaled on said shaft between said gears, a pinion shaft journaled in said frame, a pair of pinions secured on said pinion shaft engaging respectively said gears, a third pin-v 1on on said pinion shaft, a second pinion shaft journaled in said frame, and a pinion secured thereon in mesh with said third pinion. I

13. In a power transmission mechanism the combination with a gear shaft and a pair of gears secured thereon, of a frame journaled on saidshaft between said gears, a pinion shaft journaled in said frame, a pair of pinions secured on said p1n1on shaft engaging respectively said gears, a third pinion on said inion shaft, asecond pinion shaft journale in said frame, a p1n1on secured thereon in mesh with said third pinion, and means for rocking said frame about the axis of said gear shaft.

14. In a power transmission mechanlsm the combination with a gear shaft and a pairof gears secured thereon, of a frame journaled on said shaft between sald gears, a pinion shaft journaled '11'1 S9.1(;l' frame, a pair of pinions secured on said p1n1on shaft engaging respectively said gears, a th rd pinion on said pinion shaft, a second p n on shaft, bearings in which sald second p1n1on shaft'is journaled slidably mounted in said frame, and a pinion secured to said second pinion shaft adapted to be brought mto and out of operative engagement with said third pinion on said first named pinion shaft.

In testimony whereof, I have signed my name to this specification in the presence of two subscribing witnesses.

JESSE W. RENO,

Witnesses:

WILLIAM HAGENAH, WM. ROBINSON. 

